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K. V. RUDINI CALCULATING MACHINE. APPLICATION FILED APR.2, 1919.

1,352,029, Patented sept. 7,1920.l

DDDDDUDDDD MINIMUM QECIDCIEEIEEQEQ UNITED STATES PATENT OFFICE.

KARL VIKTOR RUDIN', 0F STOCKHOLM, SWEDEN.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented Sept. 7, 1920.

Application led April 2, 1919. Serial No. 287,036.

tenths and hundreds of the multiplier. An

example of this type of machine is disclosed in Letters Patent of theUnited States No.

967 ,821. granted to F. Naumann, August 16,

1910. It has been proposed to provide the carriage with keys forshifting the s ame, whereby the carriage is locked in posltion whilecalculating operations are being performed. It has also been proposed toprovide means whereby the locking device may be withdrawn independent ofthe shifting mechanism to allow the free shift of the carriagethroughout any portion of its travel.

The essential feature of my invention consists therein that the usualshifting mechanism is arranged in such a way that the mechanism in orderto release and shift the carriage must be actuated in two directions atleast. suitably in vertical as well as in horizontal way.

For the purpose of explaining the inven` tion one example embodying thesame has been shown in the accompanying drawing in which the sameyletters of refernece have been used in all the views to indicatecorresponding parte.

In said drawings Figure 1 is a view in plan of a calculating machineprovided with my present shifting mechanism` Figs. 2 and 3 are detailedsectional front-views showing the mechanism in two diEerent positions`and Fig. 4 is a detailed view in plan partly in section of themechanism.

The calculating machine consists in usual manner of a setting mechanismand a registering mechanism. The latter is in known manner provided withthe mechanism for shifting the carriage.

Said mechanism is indicated by the numeral 1 and consists of ahorizontal bar, provided with two elevations or ridges 2, 3,

serving as resting surfaces for the pressure caused by the operator inthat direction in which the carriage is to be moved after having beenunlatched or released. The usual locking device, movable in verticaldirection of the carriage, is indicated by the numeral 4 and is outsidethe plate 5, bearing the mechanism, actuated by the plate or shiftingmember l, suitably by means of a fiap or such like 6, extending downwardfrom the shifting member. Said Hap or member is provided with two armsi", which arms are pivotally mounted on a shaft 13, mounted in theframe. By means of said arms the member 1 is adapted for verticalangular movement. The arms pass through slits or openings 8 in the plate5. Below the member 1 an arm 9 is pivotally mounted on the plate 5. Saidarm is also arranged for vertical angular movement in a plane at rightangles to that of the member 1. Said armv isarranged under the member orits 6 and over the arm 4 of the usual lockmg device 4 and is on theother side of said member (reckoned from its pivot), provided with apivoted tooth or shoulder 10. This tooth or shoulder is actuated by aspring 11, which tends to hold the same in a vertical middle-position.Said spring also tends to move the arm 9 back into its resting position.When the carriage is unlatched or released said tooth or shoulderengages a tooth of the usual rack 12 and according to the direction ofmovement of the 'carriage pushes against the nearest adjacent tooth inthe direction of movement.

In order to limit the movement of the arm 9, pins or studs 14, 15 areprovided. In the same way pins or studs 16, 17 are provided for limitingthe movement of the tooth or shoulder 10.

All the parts except the lever 1 and the member of the carriage adaptedto be actuated are covered by the protecting plate 18.

The function of the arrangement is as follows If for instance thecarriage is to be shifted one step to the right, the operator pusheswith his finger suitably against the bar or plate (Figs. 1 and 2). Thefinger can, without -difficulty be placed anywhere upon the lever, forinstance upon the inside of the ridge 2. By pressing the lever or bardownward the same turns upon its shaft or pin 13 and unlatches throughthe intermediary of the flap 6 the vertical locking member 4 'from itscorresponding groove in a series of grooves (Fig. a). As soon as this isdone the carriage is shifted on accoiint of the pressure of the fingerupon the member l in horizontal direction to the right, whereby' at thesame time the arm 9 is pressed downward and brings the tooth l0 into aspace or tooth in a rack l2; The movement of the carriage cannot,however, continue tar- Atherthan one space or tooth in the raelr l2,

as the tooth l0 When said space has been passed pushes against the nextadjacent tooth of the racltlQ (Fig. 2), and on account of its beingsqueezed between the last mentioned tooth and the pin 17 stops thecarriage. lWhen hereafter the pressureV against the member l ceases, thearm 9 with the tooth l0 is moved back into its original position7whereby the locking mechanism 4t reliably takes part in the movementupward. Hence a reliable Asecuring or locking of the carriage in `theVshifted position is attained.

It is evident that the arrangement can be modified in many various WaysWithout deviating from the principle of the invention.

What l claim as new and desire to secure by Letters Patent of the UnitedStates is l. Calculating machine carriage shitting mechanism, comprisinga finger bar arranged for longitudinal and for vertical movement, ashaft, a iiap" under the linger bar and having lateral arms pivotallymounted on the shaft, a lever bar pivotally mounted at 'one end,arranged under the flap and for vertical angular movement in a plane atright angles to that of the flap, and a springheld tooth pivotallymounted at the tree end ot the lever bar, in combination With a rack anda locking lever, said locking lever being at right angles to and 'underthe said lever bar. f

2. Calculating machine carriage shitting mechanism, comprising a fingerbar arranged or longitudinal and for vertical movement, a shaft, a iapunder the linger bai` and having lateral arms pivotally inounted on theshaft, a lever bar pivotally mounted at one end, arranged under the flapand for vertical angular movement in a plane at right angles to that ofthe flap, 'a tooth pivotally mounted at the tree endet the lover bar,and a spring to normally hold said tooth in one position, in combinationWith a rack and a locking lever, said locking lever-'being at rightangles to and under the said lever bar. Y

ln testimony v'her'eot l my signature in presence of two Witnesses. u Y

.KARL VKTOB. RUDN. Witnesses ESTER EBERLUND, @Len SvnNsoN

